
General ................................................................................ 1
Inspection............................................................................. 1
Reference ............................................................................ 1
Approvals ............................................................................. 1
Nomenclature....................................................................... 2
INSTALLATION
Limitations ............................................................................ 3
Location ............................................................................... 3
Rigging and Handling .......................................................... 3
Clearances........................................................................... 3
Ductwork .............................................................................. 3
Barometric Relief / Fixed Outdoor Air
Intake Damper Assembly.................................................... 4
Condensate Drain ................................................................ 4
Compressors........................................................................ 4
Filters ................................................................................... 4
Service Access..................................................................... 4
Thermostat........................................................................... 4
Power and Control Wiring.................................................... 4
Combustion Discharge ........................................................ 5
Gas Piping ........................................................................... 5
Gas Connection ................................................................... 5
L.P. Units, Tanks and Piping ................................................ 6
Vent and Combustion Air Hoods.......................................... 6
Optional Economizer Rain Hood ......................................... 6
OPERATION
Cooling System...................................................................11
Preliminary Operation Cooling............................................11
Cooling Sequence of Operation .........................................11
Safety Controls (Cooling)....................................................11
Heating System.................................................................. 12
Safety Controls (Heating) .................................................. 12
Heat Anticipator Setpoints ................................................. 12
Pre-Start Check List........................................................... 12
START-UP
Operating Instructions........................................................ 13
Post-Start Check List ......................................................... 13
Manifold Gas Pressure Adjustment ................................... 13
Pilot Checkout.................................................................... 13
Burner Instructions............................................................. 13
Burner Air Shutter Adjustment ........................................... 14
Checking Supply Air CFM.................................................. 14
Adjustment of Temperature Rise ....................................... 15
Checking Gas Input ........................................................... 15
Secure Owner’s Approval .................................................. 15
MAINTENANCE & TROUBLESHOOTING
Normal Maintenance.......................................................... 16
Cleaning Flue Passages and Heating Elements ............... 16
Troubleshooting ................................................................. 17
Replacement Parts ............................................................ 18
TABLES
No. Description Page
1
Unit Application Data ..................................
3
2
Gas Heat Application Data..........................
5
3
Pipe Sizing ..................................................
5
4
Physical Data ..............................................
8
5
Supply Air Blower Performance..................
10
6
Accessory Static Resistances ....................
11
7
Blower Motor and Drive Data .....................
11
8
Electrical Data.............................................
11
9
Limit Control Setting ...................................
12
10
Blower Motor Pulley Adjustment.................
14
11
Gas Rate - Cubic Feet Per Hour ................
15
FIGURES
No. Description Page
1
Center of Gravity.........................................
3
2
Barometric Relief / Fixed Outdoor Air
Intake Damper Assembly.........................
4
3
Recommended Drain Piping.......................
4
4
Typical Field Wiring.....................................
5
5
External Supply Connection .......................
6
6
Bottom Supply Connection .........................
6
7
Vent and Combustion Air Hoods.................
6
8
Economizer Rain Hood Assembly ..............
7
9
Adjusting Enthalpy Setpoint........................
8
10
Unit Dimensions..........................................
9
11
Gas Valve Piping.........................................
12
12
Typical Gas Valve .......................................
13
13
Proper Flame Adjustment ...........................
13
14
Typical Flame Appearance .........................
14
15
Pressure Drop versus Supply Air CFM.......
14
TABLE OF CONTENTS
D
1
E
G
3
N
PRODUCT NOMENCLATURE
PRODUCT GENERATION
1 = 1st Generation
2 = 2nd Generation
PRODUCT CATEGORY
D = Single Package Air Conditioner
(Air Cooled)
PRODUCT IDENTIFIER
EG = Gas/Electric
VOLTAGE CODE
25 = 208/230-3-60
46 = 460-3-60
NOMINAL GAS HEATING
OUTPUT CAPACITY
090 = 7-1/2 Ton
120 = 10 Ton
150 = 12-1/2 Ton
1
0
9
0
0
2
5
FACTORY INSTALLED
HEAT
N = Natural Gas
NOMINAL COOLING
CAPACITY
130 = 130 MBH
165 = 163 MBH
200 = 198 MBH
530.22-N4Y
2
Unitary Products Group